It's sort of circular reasoning.

某种程度上这是一个循环推理

耶鲁公开课 - 欧洲文明课程节选

You have- and another example of that that would be true, is let's say you have a child who lives in this sort of circular area here, who lives here and his friends with a child who lives here.

我们还有个现实案例,假如你有个小孩,居住在我画圈的这块区域,他住在这儿,而他的朋友们住在这儿

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

It's a double stranded circular piece of DNA, meaning that the 3', 5'ends that hang off are joined back together again to form a continuous loop.

它是双链环状DNA,它的3'末端和5'末端首尾相连,构成一种连续环状结构

耶鲁公开课 - 生物医学工程探索课程节选